Opposed reciprocatory tool machine



June 18, 1935. H. M. JOHNSTON I OPPOSED RECIPROCATORY TOOL MACHINE Filed Oct. 17, 1 932 5 Sheets-Sheet l E' k 171126711 07! H465) M. JoH/vsro/v,

V/Gza June 18, 1935. H. M. JOHNSTON 2,005,319

OPPOSED RECIPROCATORY TOOL MACHINE Filed Oct. 1'7, 1932 5 Sheets-Sheet 2 lawenfof: fiq/ser AZ JoH/vs TON,

June 1935- H. M. JOHNSTON OPPOSED RECIPROCATORY TOOL MACHINE Filed Oct. 17, 1952 5 Sheets-Sheet 3 lllllill Hwaer M Jo/y/vero/v' i/ fife/way June 18, 1935. H M. JOHNSTON v 2,005,319

OPPOSED RECiPROCATQRY TOOL MACHINE Filed Oct. 17, 1952 5 sheets-s eet --4 H IIH. my m u 17we7d07':

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June 18, 1935. H. M, JOHNSTON 2,005,319

OPPOSED RECIPROCATORY TOOL MACHINE Filed Oct. 17, 1952 5 Sheets-Sheet 5 Inventiv- Patented June 18, 1935 OPPOSED RECIPROGATORY TOOL I MACHINE Harry M. Johnston, McKeesport, Pa., assignor to National Tube Company, a corporation of New Jersey Application October 17,

5 Claims.

. This invention relates to opposed reciprocatory tool machines. One .of the objects is the provision of a machine which operates in a semiautomatic manner. Other objects may be in- :5 ferred from the following disclosure of a specific form of the invention.

Referring to the accompanying drawings- Figure l'isa top plan. Figure 2 isa side elevation. Figure 3 is an enlarged cut away side elevation. Figure 4 is an end elevation. Figure 5 is an end elevation showing the one opposite that of Figure 4.

Figures 6 and 7 are enlarged details. Figure 8 is an enlarged detail showing one type of tool working a pipe coupling.

A hollow base i carries housings 2 and 3 interconnected by a bridge 4. These housingsmount the reciprocative tools and the bridge'forms the upper support for a vise means holding pipe couplings therebetween. The visev means includes an upper jaw member 6 carried by apiston I fitted in a cylinder 8 carried bythe bridge 4 and a fixed lower jaw 6 This cylinder and bridge are here formed by a single casting to provide structural simplicity.

A track or slide 9 is carried by apair. of cylinders l0 fitting vertical guiding pistons H fixed to the base I. from the machine, in alinement with the jaw members and has a slotted end fitting around the fixed lower one of the latter. That is to say,

7 the track or slide-9 rises and lowers on a horizontal plane and has an end encompassing the lower jaw member of the visemeans.

This slide-mounts a carriage l2 consisting of two parallel arms interconnected at one end by a handled cross-member l3 and constructed with laterally alined coupling depressions. This carriage is arranged sothat its arms may slide by both sides of the fixed jaw member 5.

' The jaw members are here constructed to hold two couplings at once so that the movable member 6 is centrally pivoted to its actuating piston to insure equal pressure on both couplings. This piston is connected by rods I4 to the two cylinders l0 carrying the slide 9 sothat when the a movable jaw is forced into coupling engaging position the carriage l2 will be pushed well below the level of the fixed vise member. A constant pressure is maintained in the cylinders l0 so that the slide 9, carriage l2 and upper movable jaw member Gare urged upwardly.

The couplings are loadedin the depressions ion the carriage l2fwhen the latter is pulled to the outermost limits of the slide 9. The carriage is then pushed intothe machine and pressure applied to the cylinder 8. This forces the movable jaws 6, slide 9 andcarriage l2 downwardly. The couplings then are engaged by the vise means This slide extends horizontally 1932, Serial No. 638,246

and'freed from the carriage which may be pulled v to its outermost position so that two more couplings can be loaded thereon.

As soon as the couplings in the machine are completely worked the pressure is released from the cylinder 8 and the movable jaws, slide and carriage are forced upwardly by the pressure in the cylinders It. The carrier [2 is again pushed into the machine and its ends engage the'two couplings already there and push them out of the way so that the two new loaded couplings may be positioned for engagement by the vise means.

The above loading operation may be performed very quickly. The moment the loaded carriage i2 is shoved into the machine pressure may be applied to the cylinder 8 to clamp the couplings. This will automatically push the slide to a downward position and permit removal of the carriage l2 which may be immediately reloaded.

The tool reciprocating mechanism is carried by the housings 2 and 3. It includes two pairs of opposed reciprocatory spindles I5. These rotate in antifriction bearings carried by mounts l5 which slide in guide sleeves H. The innermost ends of these spindles carry tools suitable to shape the couplings held by the vise means previously described. It might be mentioned that these couplings are in the usual blank form which must be shaped for tapping. The means accomplishing this consist merely of cutting tools suitably clamped to the spindles [5.

pling, The shaft 2| is connected to the driveshafts 18 by heavy spur-gears 22.

'As sof'far described, the machine includes ro-,

tativelydr'iven reciprocatory tool spindles. In addition,' the machine includes a mechanism for feeding these spindles quickly up to working position and then at a slower and proper working speed. When the tools have finished their work this mechanism quickly-withdraws them and permits operation of the vise means as described. This mechanism includes a two-arm lever 23. The lower arm of this lever is fixed to the two lefthand spindles. A one-arm lever 24 is fixed to the two right-hand spindles and to the upper arm of this lever 23 by a connecting-rod 25. When the two-arm lever 23 is reciprocated the opposed spindles will move in opposite directions.

A ratchet-wheel 26 is arranged adjacent this lever 23 and is continually driven in one direction. In the present instance it is driven by the motor. 2|. The .connection is made by a gear train 21 driven by the left-handdrive-shaft l8 and driving the ratchet-wheel 26 through a worm gearing 28. This drive is finally effected through a slip clutch 29. V

The ratchet-wheel 26 and the gear driven by the worm are freely mounted on a shaft 30 which also fixedly mounts an arm 3i. This arm isconnected to the two-arm lever'23'by a link 32. The end of the shaft 30 also mounts a second arm 33 adjacent the ratchet-wheel 26. A shaft 34 interconnects the ends of these two arms. As the arm 3| is outside of the housing 2 and the arm 33 is inside, it is necessary to construct the housing with an arcuate slot 35 through which the shaft 34 passes.

The end of the shaft 34 adjacent the ratchetwheel 26 carries a dog 36 which engages therewith when urged by a spring 31 which, in the present instance, is arranged at the outside end of the shaft. This shaft also fixedly carries a cam faced lever 38 on its outside end. This cam faced lever is arranged to turn the shaft 34 so the dog 36 is thrown out of engagement with the ratchetwheel 26.

The gear train 2'! is arranged to drive the ratchet-wheel so that when engaged by the dog 36 the arm 3| will be turned in a direction which will move the spindle interconnecting system in a direction causing the tools to feed into the work. When the arm 3| is oppositely moved this spindle interconnecting system will be moved in a direction causing the separation of the spindles.

An air cylinder 39 in which a plunger 40 is fitted is arranged to push the arm 3| in a direction which will feed the spindles together. The stroke of the plunger is controlled by a backward ly extending rod 4| provided with an end which engages spacers 42. These spacers are removable and may be substituted by others. of different sizes.

A second air cylinder 43 opposes the cylinder 39 and has a plunger 44 which moves the arm 31 in a direction to separate the spindles. In the present instance this plunger consists .ofinner and outer sliding parts. The inner part having the greater, area begins its movement first and is arranged to engage the cam surface of the lever 33 .to disengage the dog 36. The outer part then comes in engagement with the arm 3|, moves as a unit with the inner one and causes the spindles to separate.

Preferably, the cylinders 8 and 29 are connected to an air line through a valve 45. This valve is constructed to simultaneously admit air to both the cylinders when thrown in one direction. The cylinder 43 may also be connected to this valve. This valve may be further constructed so that when thrown in an opposite direction it willsimultaneously exhaust the cylinders 8 and 39 and admit pressure to the cylinder 43. The arm 3| may be provided with a projecting end 46 which engages adjustable stops 4'! at both extremes of its movement. This provides a means for limiting the reciprocating extremes of the spindles. When this stoppageoccurs the friction clutch 29 will slip.

.Although a specific form of this invention has been shown and described in accordance with the patent statutes, it is not intended to limit its scope exactly thereto, except as defined by the following claims.

'.I claim:

1. In a machine including 1 ojaposed reciprocatory tools, a downwardly movable upper jaw and a fixed lower jaw arranged between said .tools, .a depressible horizontal slide extending away from said jaws and having a slotted end fitting around said fixed lower jaw, a carriage carried by .said .slide' and having parallel arms constructed to slide by both sides of said fixed lower jaw and in which there are laterally alined coupling-receiving depressions, means for urging said slide upwardly, means for interconnecting said downwardly movable upper jaw and said slide, and means for forcing .saidupperjaw downwardly so that said slide is moved downwardly against the urgeof the first namedmeans.

2. The combination .of opposed'reciprocatory .too1s,'a fixed lower jaw, anupper jaw arranged for clamping action againstsaid lower jaw, said jaws being arranged to holdwork between said tools, a downwardly movable track orslide transversely associated with'said lower jaw, and a carriage riding said trackxor slide. and constructed to carry work toaposition between said jaws so that downward movement of said track or slide will cause said work to be deposited on said lower jaw.

3. The combination of opposed reciprocatory tools, a fixed lower jaw,..an upper jaw arranged for clamping action againstsaid lower jaw, said jaws being arranged to hold work between said tools, a downwardly movable track or slide transversely associated with said lower jaw, and a car-" riage riding said track or slide and constructed to carry work to a position between said jaws so that downward movement of said track or slide will cause said work to be deposited on said lower jaw, and'means for interconnecting said upper jaw and said track or slide for mutually dependent movement, whereby clamping action of said upper jaw will cause said downward movement ofsaid track or slide.

4. The combination of opposed reciprocatory tools, a fixed lower jaw, an upper jaw arranged for clamping action against said lower jaw, said jaws being arranged to hold work between said tools, a downwardly movable track or slide transversely associated with said lower jaw, a carriage riding said track or slide and constructed to carry work to a position between said jaws so that downward movement of said track or slide will cause said work to be depositedon said lower jaw, means for interconnecting said upper jaw and said track or slide for mutually dependent movement, whereby clamping action of said upper jaw will cause said downward movement of said track or slide, and means for constantly urging said track or-slide upwardly so that said carriage can carry Work to said position without interference by said lower jaw.

5. In a machine including opposed reciprocatory tools, a downwardly movable upper jaw and a fixed lower jaw arranged'between said tools, a depressible horizontal slide extending away from saidjaws and having a slotted end fitting around said fixed lower jaw, and a carriage carried by said slide and having parallel arms constructed to slide byboth sides of said fixed lower jaw and'in which there are laterally alined coupling-receiving depressions.

HARRY. M. JOHNSTON. 

